The Ilitek IL79900A display controller is similar to the ILI9882T and can be supported within the existing `panel-ilitek-ili9882t.c` driver.
This patch extends the ILI9882T driver to handle IL79900A-based panels, such as the Tianma TL121BVMS07-00. The IL79900A uses a similar command sequence and initialization flow, with minor differences in power supply configuration and timing. Signed-off-by: Langyan Ye <[email protected]> --- drivers/gpu/drm/panel/panel-ilitek-ili9882t.c | 69 +++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c index 85c7059be214..c52f20863fc7 100644 --- a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c @@ -61,6 +61,13 @@ struct ili9882t { mipi_dsi_dcs_write_seq_multi(ctx, ILI9882T_DCS_SWITCH_PAGE, \ 0x98, 0x82, (page)) +/* IL79900A-specific commands, add new commands as you decode them */ +#define IL79900A_DCS_SWITCH_PAGE 0xFF + +#define il79900a_switch_page(ctx, page) \ + mipi_dsi_dcs_write_seq_multi(ctx, IL79900A_DCS_SWITCH_PAGE, \ + 0x5a, 0xa5, (page)) + static int starry_ili9882t_init(struct ili9882t *ili) { struct mipi_dsi_multi_context ctx = { .dsi = ili->dsi }; @@ -413,6 +420,38 @@ static int starry_ili9882t_init(struct ili9882t *ili) return ctx.accum_err; }; +static int tianma_il79900a_init(struct ili9882t *ili) +{ + struct mipi_dsi_multi_context ctx = { .dsi = ili->dsi }; + + mipi_dsi_usleep_range(&ctx, 5000, 5100); + + il79900a_switch_page(&ctx, 0x06); + mipi_dsi_dcs_write_seq_multi(&ctx, 0x3e, 0x62); + + il79900a_switch_page(&ctx, 0x02); + mipi_dsi_dcs_write_seq_multi(&ctx, 0x1b, 0x20); + mipi_dsi_dcs_write_seq_multi(&ctx, 0x5d, 0x00); + mipi_dsi_dcs_write_seq_multi(&ctx, 0x5e, 0x40); + + il79900a_switch_page(&ctx, 0x07); + mipi_dsi_dcs_write_seq_multi(&ctx, 0X29, 0x00); + + il79900a_switch_page(&ctx, 0x06); + mipi_dsi_dcs_write_seq_multi(&ctx, 0x92, 0x22); + + il79900a_switch_page(&ctx, 0x00); + mipi_dsi_dcs_exit_sleep_mode_multi(&ctx); + + mipi_dsi_msleep(&ctx, 120); + + mipi_dsi_dcs_set_display_on_multi(&ctx); + + mipi_dsi_msleep(&ctx, 80); + + return 0; +}; + static inline struct ili9882t *to_ili9882t(struct drm_panel *panel) { return container_of(panel, struct ili9882t, base); @@ -529,6 +568,19 @@ static const struct drm_display_mode starry_ili9882t_default_mode = { .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, }; +static const struct drm_display_mode tianma_il79900a_default_mode = { + .clock = 264355, + .hdisplay = 1600, + .hsync_start = 1600 + 20, + .hsync_end = 1600 + 20 + 4, + .htotal = 1600 + 20 + 4 + 20, + .vdisplay = 2560, + .vsync_start = 2560 + 82, + .vsync_end = 2560 + 82 + 2, + .vtotal = 2560 + 82 + 2 + 36, + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, +}; + static const struct panel_desc starry_ili9882t_desc = { .modes = &starry_ili9882t_default_mode, .bpc = 8, @@ -543,6 +595,20 @@ static const struct panel_desc starry_ili9882t_desc = { .init = starry_ili9882t_init, }; +static const struct panel_desc tianma_tl121bvms07_desc = { + .modes = &tianma_il79900a_default_mode, + .bpc = 8, + .size = { + .width_mm = 163, + .height_mm = 260, + }, + .lanes = 3, + .format = MIPI_DSI_FMT_RGB888, + .mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | + MIPI_DSI_MODE_LPM, + .init = tianma_il79900a_init, +}; + static int ili9882t_get_modes(struct drm_panel *panel, struct drm_connector *connector) { @@ -680,6 +746,9 @@ static const struct of_device_id ili9882t_of_match[] = { { .compatible = "starry,ili9882t", .data = &starry_ili9882t_desc }, + { .compatible = "tianma,tl121bvms07-00", + .data = &tianma_tl121bvms07_desc + }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, ili9882t_of_match); -- 2.34.1
